<template>
    <div>
        <el-card class="box-card"
                 v-loading="loading">
            <el-input
                    placeholder="输入关键字进行过滤"
                    v-model="filterText">
            </el-input>

            <el-tree
                    style="margin-top: 10px"
                    :data="deps"
                    :props="defaultProps"
                    :filter-node-method="filterNode"
                    :expand-on-click-node="false"
                    ref="tree">
                 <span class="custom-tree-node" style="display: flex;justify-content: space-between;width: 100%" slot-scope="{ node, data }">
                     <span>{{ node.label }}</span>
                     <span>
                      <el-button
                              type="primary"
                              size="mini"
                              class="depBtn"
                              @click="showAddView(data)"
                              >
                        添加部门
                      </el-button>
                      <el-button v-if="data.parentId != -1"
                              type="danger"
                              size="mini"
                              class="depBtn"
                              @click="deleteDep(data)"
                              >
                        删除部门
                      </el-button>
                    </span>
                </span>
            </el-tree>
        </el-card>
        <el-dialog
                title="添加部门"
                :visible.sync="dialogVisible"
                width="30%">
            <div>
                <table>
                    <tr>
                        <td>
                            <el-tag>上级部门</el-tag>
                        </td>
                        <td>{{pname}}</td>
                    </tr>
                    <tr>
                        <td>
                            <el-tag>部门名称</el-tag>
                        </td>
                        <td>
                            <el-input v-model="dep.name" placeholder="请输入部门名称..."></el-input>
                        </td>
                    </tr>
                </table>
            </div>
            <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="doAddDep">确 定</el-button>
  </span>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        name: "DepManager",
        data() {
            return {
                dialogVisible: false,
                filterText:'',
                deps:[],
                dep: {
                    name: '',
                    parentId: -1
                },
                pname: '',
                defaultProps: {
                    children: 'children',
                    label: 'name'
                },
                loading:true

            };
        },
        watch: {
            filterText(val) {
                console.log(val)
                this.$refs.tree.filter(val);
            }
        },
        mounted() {
            this.initDeps();
        },
        methods: {
            initDep() {
                this.dep = {
                    name: '',
                    parentId: -1
                }
                this.pname = '';
            },
            addDep2Deps(deps, dep) {
                for (let i = 0; i < deps.length; i++) {
                    let d = deps[i];
                    if (d.id == dep.parentId) {
                        d.children = d.children.concat(dep);
                        if (d.children.length > 0) {
                            d.parent = true;
                        }
                        return;
                    } else {
                        this.addDep2Deps(d.children, dep);
                    }
                }
            },
            doAddDep() {
                this.postRequest("/system/basic/dep/", this.dep).then(resp => {
                    if (resp) {
                        this.addDep2Deps(this.deps, resp.data);
                        //初始化变量
                        this.initDep();
                        this.dialogVisible = false;
                    }
                })
            },
            initDeps(){
              this.getRequest("/system/basic/dep/").then(resp=>{
                  if (resp.data){
                      this.deps = resp.data;
                      this.loading = false
                  }
              })
            },
            filterNode(value, data) {
                console.log(data)
                if (!value) return true;
                return data.name.indexOf(value) !== -1;
            },
            showAddView(data){
                this.dialogVisible=true;
                this.pname = data.name;
                this.dep.parentId = data.id;
            },
            deleteDep(data){
                if (data.parent) {
                    this.$message.error("父部门删除失败");
                } else {
                    this.$confirm('此操作将永久删除【' + data.name + '】部门, 是否继续?', '提示', {
                        confirmButtonText: '确定',
                        cancelButtonText: '取消',
                        type: 'warning'
                    }).then(() => {
                        this.deleteRequest("/system/basic/dep/"+data.id).then(resp=>{
                            if (resp) {
                                this.removeDepFromDeps(null,this.deps,data.id);
                            }
                        })
                    }).catch(() => {
                        this.$message({
                            type: 'info',
                            message: '已取消删除'
                        });
                    });
                }
            },
            removeDepFromDeps(p,deps, id) {
                for(let i=0;i<deps.length;i++){
                    let d = deps[i];
                    if (d.id == id) {
                        deps.splice(i, 1);
                        if (deps.length == 0) {
                            p.parent = false;
                        }
                        return;
                    }else{
                        this.removeDepFromDeps(d,d.children, id);
                    }
                }
            },

        },
    }
</script>

<style>
.depBtn{
    padding: 2px;
}
</style>